Ignition Leads

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FAQs Apply for Trade Credit

What are ignition leads?

Ignition leads are basically hardwearing conductors that can withstand some serious voltage and lots and lots of use. An ignition lead transfers the power from your distributor, ignition coil or magneto to your spark plugs, firing up your engine. If they’re working, you’re driving!

Symptoms of faulty ignition leads

It’s common for high-tension, otherwise known as HT, leads to wear out over time. You’ll notice it as your car may misfire or not start at all. The connectors can also get dirty, which can affect how they perform. Faulty leads can affect how your car performs and driving with a misfiring engine can cause damage that can be costly to put right. Swapping your ignition leads is easy and the replacement parts are affordable.

Order spark plug leads from Halfords

Avoid any hassle and find the right products for you by using our car parts search tool to find the spark plug wires for your vehicle. Enter your registration and it will display the correct parts for your car. Buy online or use our Click and Collect service for convenient pick up from your choice of local Halfords stores. While your leads can wear out on their own, it’s worth looking at the whole ignition system - particularly consumables like spark plugs. We stock a comprehensive range of ignition system parts and spares, all at great prices from a brand you can trust.

Ignition Lead FAQs

How long do ignition leads last?

Most sets last for years, but heat and wear eventually break them down. If you notice rough running, misfires or the engine using more fuel, it could be time to change them.

How to change ignition leads?

Changing ignition leads is straightforward: replace them one at a time so you don’t mix up the firing order. If you’re unsure, Halfords can help you choose the right set and fit them for you.

Are all high performance ignition leads fit all cars​?

No, they need to match the engine they’re made for. High performance leads won’t fit every car, so always check compatibility first. At Halfords you can enter your registration to make sure you get the right ones.